Preheat your oven to 375°F (190°C) and line a muffin tin with paper liners or lightly grease it.
In a large bowl, whisk together the flour, granulated sugar, brown sugar, baking powder, baking soda, and salt.
In a separate bowl, mix the sour cream, oil, eggs, and vanilla until well combined.
Pour the wet ingredients into the dry and stir until just combined. Don’t overmix—lumpy is lovely.
Gently fold in the chopped cherries. Frozen cherries? No problem—toss them in still frozen.
Divide the batter evenly among the muffin cups, filling each about 3/4 full. Sprinkle coarse sugar on top if using.
Bake for 16–18 minutes or until a toothpick poked in the center comes out clean.
Let cool in the pan for 5 minutes before transferring to a wire rack. Eat warm, or save for tomorrow (if they last).